Electric heater



y 1929- F. w. WANDLESS 1,713,013

ELECTRIC HEATER Filed Au 25, 1928 INVENTOR. [71917511 W. VVBIId/LESSPatented I May 14, 1929.

UNITED STATES FRANKLIN W. WANDLESS, OF BERWYN, PENNSYLVANIA.

ELECTRIC HEATER.

Application filed August 25, 1928. Serial No. 302,021.

The object of this invention is to provide an electric heater of novel,simple and efficient construction by means of which the heat from aheating element, such as an electrical resistance element, may beutilized by radlatlon, conduction and convection for heating the airwithin -a room of a house or building.

With the foregoing and related ob]ects in view, the invention consistsof the elements and the combinations of them hereinafter described andclaimed.

In the accompanying drawings, illustrating the invention, t

Figure 1 is a perspective view of a heater showing one form ofembodiment of my invention.

Figure 2 is a top View thereof.

Figure 3 is a verticalsection through the heater.

Referring to the drawings, 2 designates a supporting base which may beof any suitable shape and size for its intended purpose. Risingl fromthe base 2 is a frame or guard 3 enclosing and supporting a ,plate orsheet 4 which also rises from the supporting base 2. The plate or sheet4 may be formed of any suitable heat conducting material, preferablymetal and I have found a plate formed of copper to give very goodresults.

Secured to the plate 4 by riveting or other suitable means and coveringone face thereof .is a corrugated plate 5 which, like the plate 4, maybe formed of any suitable heat conducting material such as copper.

Arranged opposite to the corrugated sheet 5 is a concave bowl-likereflector 6 which may be formed of suitable metal having its inner orconcave surface 7 facing the corrugated sheet 5. This part or reflector6 is supported in spaced relation to the sheet 4, as illustrated in thedrawings, by side brackets 8 which project fixedly fromthe sides of theframe 8 and which are suitably secured to the part or reflector 6.

Supported by and within the reflector 6 centrally thereof between itsconcave surface 7 and the opposite surface 9 of the corrugated plate 5is a heating element 10 in the form of a coil of electrical resistancewire which surrounds a core 11 of porcelain or other suitable material.Extending from the terminals of the element or coil 10 and through thereflector or part 6 are flexible, insulated, conducting wires 12 forsupplylng current to the coil 10 in the usual manner well known in theart of electric heaters, and it will be understood that the coil 10 andwires 12 are suitably insulated from the metal part or reflector 6.

The inner or concave surface 7 of the part or reflector (3 is highlypolished or otherwise made bright so as to form an effective heatreflecting surface directed toward the corrugated sheet 5, and thesurface 9 of the corrugated sheet 5 is made dark and dull and of a heatabsorbing character to receive and absorb the radiant heat from theheating element 10 reflected to the sheet 5 by the reflector 6.

The corrugations in the sheet 5 enhance the surface area thereof exposedto the radiant heat waves directed thereto by the reflecting surface 7of the reflector 6, and these heat waves are absorbed by the dull heatabsorbing surface 9 of the sheet 5 facing the reflector 6, and the heatwaves thus absorbed are transmitted by conduction to the body of thesheet 5 and also to the body of the outer plain or flat sheet 4 which isin contact with the corrugated sheet 5.

The corrugations of the sheet 5 also provide vertically extendingchannels 13 between the sheets 4 and 5 and vertically extending channels14 between the corrugations-0f the sheet 5 on the surface thereof whichfaces the reflector (3, so that as the bodies of the sheets 4 and 5 areheated'by absorption andconduction as above explained they will heat theair which is in contact with the exposed surfaces thereof and therebycause the air thus heated to ascend through the channels 13 and 14 andadjacent to the outer surface of the sheet 4 and thus set up acontinuously moving current of air which will circulate through the roomor enclosure containing the heater and which will be heated by thesurfaces of the sheets 4 and 5 as it passes the same in con tacttherewith, and the heat thus received by the circulating air will bediffused throughout the air of the entire room or enclosure.

I claim as my invention:

1. The combination of a part having a bright heat reflecting surface, apart having a dull heat absorbing surface spaced from and facing theheat reflecting surface of the first named part, supporting means forsaid parts, and a heating element supported between said surfaces.

2. The combination of a part having a bright, concave, heat reflectingsurface, a part having a dull, vertically extending, heat absorbin gsurface facing the heat reflecting surspaced from said between said faceof the first named part, supporting means 3. The combination of a parthaving a concave heat-reflecting surface, and a corrugated sheetof'metal having a heat absorbing surface spaced from and facing saidheat, reflecting surface and providing hot air ascending channelsbetween the corrugations thereof, supporting means for said partand saidsheet, and a heating element supported art and said sheet.

4. The com ination of a part having a concave heat reflectin surface, avertically extending sheet of eat conducting material part, a corrugatedsheet of metal secured to the first named sheet and having a heatabsorbing surface spaced from and facin said heat reflecting surface andproviding ot air ascending channels between said sheets and between thecorrugations of the second named sheet, supporting means for said partand said sheets, and' a heatingwlement supported between said part andsaid corrugated sheet.

' from the base,

5. The combination of a supporting base, a sheet of metal rising fromthe base and having a dull heat absorbing surface, a part having abright, concave, heat reflecting surface facing said heat absorbingsurface, means for sup orting said part sur ace spaced from the heatabsorbing surface of said sheet, and a heating element supported betweensaid sheet and said part.

6. The combination of a supporting base, a sheet of heat conductingmaterial rising a corrugated sheet of metal secured to said sheet andhaving a dull heat absorbing surface and providing hot air ascendingchannels between said sheets and between the corrugations of the secondnamed sheet, a part having a bright, concave, heat reflecting surfacespaced from and facing the heat absorbing surface of the corrugatedsheet, supporting means for said part, and a heating element supportedbetween said .part and said corrugated sheet.

In testimony whereof I aflix my signature.

FRANKLIN W. WANDLESS.

with its heat reflecting

